code: def is_power_of_2(n):
      return (n & (n - 1) == 0) and n != 0
  
file_path: ffcv/ffcv/utils.py
imports: import numpy
  from numba import types
  from numba.extending import intrinsic
  from threading import Lock
label_desc: Use image node_id 2 for calling a global function with example usage: is_power_of_2(n) and returns: unknown